There are large areas of emergence of a suit of epimetamorphic series in northeast Jiangxi area and this suit of strata has a controversial age because of lacking of reliable fossil data.
赣东北地区大面积出露一套浅变质岩系，该套地层由于缺乏可靠的化石资料，其时代归属一直存在很大的争议。
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